The lens is almost two years old so that ship has long sailed unfortunately, I'm just generally lazy and leave the 100-400mm on the camera and when I need something better use the 24-70/70-200mm on the Nikon so this week I thought I would properly use the 28-200mm.
No I haven't used a tripod but have used a higher shutter speed, I was seeing the same at 1/125:
A lot of the blurry ones are of the dog even though he's fairly static and the shutter speed is at 1/125 but he might have been flicking his head faster than I was realising.
The ISOs were all low between 100 and 250.